本文選題：凍土 + 凍脹量��； 參考：《工業(yè)建筑》2017年11期

【摘要】：對(duì)分凝冰現(xiàn)象的研究是理解凍土中各類復(fù)雜現(xiàn)象的關(guān)鍵。為研究上覆荷載作用下,線性降溫模式的分凝冰形成規(guī)律,利用高低溫交變箱,進(jìn)行開放系統(tǒng)下土體的一維連續(xù)凍結(jié)試驗(yàn)。選取3個(gè)冷端初始溫度,3個(gè)上覆荷載進(jìn)行正交試驗(yàn),比較分析每個(gè)試驗(yàn)條件下試樣內(nèi)部溫度場(chǎng)的變化規(guī)律、凍結(jié)鋒面隨時(shí)間的推進(jìn)規(guī)律、凍脹量變化規(guī)律以及水分的遷移情況。試驗(yàn)結(jié)果表明:上覆荷載越小,冷端初始溫度越低,土樣內(nèi)部溫度越低,含水率越高,凍脹量越大。
[Abstract]:The study of ice separation is the key to understand the complex phenomena in frozen soil. In order to study the law of ice formation in linear cooling model under overburden load, the one-dimensional continuous freezing test of soil under open system was carried out by using a high and low temperature alternating box. Three cold end initial temperatures and three overlying loads were selected to carry out orthogonal experiments. The variation of temperature field in each test condition was compared and analyzed. The advancing law of freezing front with time, the changing law of frost heaving and the migration of water were compared and analyzed. The experimental results show that the lower the overburden, the lower the initial temperature at the cold end, the lower the temperature inside the soil sample, the higher the moisture content and the greater the frost heave.
【作者單位】： 江蘇大學(xué)土木工程與力學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(11272137)
【分類號(hào)】：TU445

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本文編號(hào)：1821934